Fountain pen



Aug. 1932- F. M. ASHLEY 1,874,024

' FOUNTAIN PEN Filed Jan. 17, 1951 1 enema Au so, was

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FRANK M. ASHLEY, 0F BROOKLYN, NEW YORK FOUNTAIN Application filedJanuary 17, 1931. Serial No. 509,403.

My invention relates to fountain pens.

The object of my invention is to provide a self-filling fountain pen inwhich a piston is used to fill the pen and in which the piston andpiston-rod is made hollow to serve as a part of the ink reservoir.

A further object is to provide means for increasing the length of thepiston-rod comprising an extension member which extends over the rod andthe outer diameter of which is very nearly as great as theouter diameterof the barrel of the pen. s

A further object is to provide a pen having a long smooth grippingsurface .for the fingers and in which the thread which engages the cap,is located between the gripping surface and the rear end of the pen.

A further object is to provide a pen having a transparent or translucentsection located adjacent the pen-section thru which the ink may be seenin the reservoir of the pen.

Further objects of my invention and the advantages of the constructionwill be hereinafter set forth, one of which is to make the reservoir ofa number of short tubular sections to reduce the waste in manufacturingcaused by injury to a part, such as the barrel, which when injured must,be discarded. whereas when made in short sections, only the relativelyshort section injured, must be discarded.

Referring to the drawing which-forms a part of this specification;

Fig. 1 is a longitudinal sectional view of a pen, shown on an enlargedscale, embodying my invention.

Fig. 2 is an exterior view of the pen.

Fig. 3 is a cross sectional view on line 3 3 of Figure 1.

Fig. 4 is a cross sectional view on line 4-4: of Figure 1.

10, indicates a portion of the barrel of the i pen, the innercylindrical wall of which is formed smooth and is provided with ashoulder 11 which serves as an abutment for the piston 12.

A thread 13- for the cap (not shown) is formed on the end of the section10 as illustrated;

A tubular section 14- of transparent or translucent material such ascelluloid or bakelite is connected to the portion 10- by a thread 15-and a pen-section 16- is connected by a thread 17- to the section 14.--;

the outer surfaces '18- and 19-- providing 1 a relatively long smoothgripping surface for the fingers in writing.

The hollow piston 12- is provided with a hollow piston-rod 20- formedintegral therewith which is threaded its entire length on its exteriorsurface to engage the thread 21 formed in the extension sleeve 22. T histhread is preferably fast pitch or may be a double thread of fast pitchto permit the sleeve 22- to be rapidly screwed outward from the section10 to serve as an extension of the piston-rod. 1

The inner diameter of the sleeve 22- is enlarged as shown at 23- enoughto entirely prevent thread engagement, and to provide a shoulder 24-which abuts the flange 25- which flange serves as a packing for the nut26- which closes the rear end of the pistonrod and thus preventsdis-engagement of the rod and sleeve.

The piston is made with an annular groove 27 in which cork or othersuitable packing 28- is located.

29- indicates a feed-plug having the usual feed duct 30- and is.provided with a small capillary opening 31- which leads to a tube 32which tube extends therefrom to a redetermined point within thepiston-r0 as shown. I v

The short length of the section 10 makes it a relatively easy job toprovide a true smooth cylindrical surface 33- for the-piston to slldeupon, which is one of the most diflicult and important points in pistonpen construction, and since the pen is made to fill by a number of shortstrokes of the piston, this section is made of a length to correspond tothe greatest length of stroke, al-

greater number of strokes hereinafter set forth. i

The parts are assembled as follows:

though the pen may be filled by making a of less length, as

22- is screwed onto the piston-rod to the position shown, which clampsthe back edge of the piston a ainst the shoulder 11 to form a valveinli-tight joint independent 01 the piston packing and serving also tovent any movement of the piston rod.

The nut 26 is then screwed into the open rear end of the piston-rod, asshown.

The section19 is then screwed firmly into the section 10 afterwhich thefeed-plug with its tube connected, is adjusted in the usual manner.

Fountain pens with large reservoir capacityl are sure to drop ink fromthe pen-point w en the reservoir becomes nearly em ty, caused by therelatively large volume 0 an admitted above the ink in the reservoir,which expands by heat or by change of barometric pre- .1 pressure andforces the ink from the resaction above referred to without ervolr.

The present construction can be regulated to prevent this trouble: Whenthe ink has been partly removed from the reservoir, the sleeve 22- maybe screwed outwardly on the piston-rod and then by holding the pen-pointupwardly the piston may be moved upwardlfy in section 10- to any degreedesired, thus orcing the air from the reservoir into the outeratmosphere and reducing the, capacity of the reservoir, and thiswillprevent the drip altering the len t of the pen as a whole, o fillthe reservoir, the front end 9f the pen-section 18 is immersed in a bodyof ink and the sleeve 22- is screwed outward to the hmit of its travelon the piston-rod and serves as a handle to operate the piston.

On each successive inner stroke of the piston, air trapped in the upperend of the reservoir 34- above the surfaceof the ink, will be forcedoutthru the tube 32%- and passages 31-- and 30, and on each successiveouter stroke of the piston, ink wil be drawn directl into the reservoirthru the feed duct '30, an trapped in the reservoir, and in this mannerthe reservoir may be completely filled with ink.

The construction and use of the air tube in fountain pens is well knownin and requires no special description. 7 p I The present constructionpermits the use this art 1. A fountain pen comprising a pen 'secF tion,a translucent cylindrical section connected thereto, a barrel connectedto said cylindrical section, a piston in said barrel having a hollowpiston-rod open at its inner end, and which extends beyond the end ofthe barrel, an extension sleeve connected to said piston-rod and movablerelative thereto, and means comprising a flange for preventing thedisengagement of the sleeve and rod.

2. A fountain pen comprising a pen section, a cylindrical sectionconnected thereto, a barrel connected to said section having a thread onits end adjacent to said'cylindrical section, a piston in said barrelhaving a hollow piston-rod open at its inner end, and

extending beyond said barrel, an extension sleeve connected to said rod,said sleeve abutting said barrel and holding said piston against one endof said barrel in fluid tight relation therewith.

'3.,As stated in claim 2: and means for preventing the disengagement ofthe extension sleeve and piston-rod, comprising a flange carried by thepiston rod.

4. A fountainpen comprising a pen section, a barrel, a piston having ahollow piston-rod open at its inner end and extending beyond saidbarrel,and having a thread formed in its outer surface, an extension sleevehaving a thread engaging thethread on the piston-rod and serving as ahandle to move the-rod, means for preventing the disengagement of thesleeve from the rod comprising aflan e carried on the outer end of thepiston-r0 and extending laterally beyond the thread to form an abutmentfor the sleeve. I I

In testimony whereof I- have aflix'ed my of different colored sectionsand sleeves by the use of which a very ornamental and at- I tractive penmay be'provide'dat a low cost.

. It is important thatthe material used in section 10 in which thepiston slides, shall be made of a substance which will not easily v warpor change its form, suchas hard rubber 2 or bakelite, and it ispreferable to use a wall of greater thickness for this section than isusually employed, and this may be done without unduly sacrificing claimas new:

the reservoir capacity 7 as this section is short. I Having thusdescribed my invention I'-\

